Abstract: The discharge chute opening and closing apparatus for lawn mowers comprises a vertical bar fixedly attached to a pivot bar, rotatably mounted between first and second pivot stanchions; a pivot arm fixedly attached to the pivot bar at a first end and engaged with a cam pin at a second end; a cam plate comprising a cam pin and a drive pin, rotatably attached to a third pivot stanchion; a lift plate rotatably attached to the third pivot stanchion and fixedly attached to a chute door being operably engaged by the cam and drive pins; a second lift plate fixedly attached to a fourth pivot stanchion further comprising a spring attachment; a spring attached at a first end to the spring attachment of the lift plate and attached at a second end to a spring mounting bracket wherein the spring assists in maintaining the position of the chute door.

Abstract: A vibratory shaker for mounting on a crop harvester framework for removing crops from vines, bushes, and trees has a crop foliage engaging brush that is driven directly about a brush rotation axis by a brush driving motor. The crop foliage engaging brush and the brush driving motor are supported for rotation on the crop harvester framework. The power for driving the brush driving motor is controlled to provide oscillatory motion subject to operator controlled frequency, amplitude and oscillatory wave shape.